Is the use of had correct after helping verb has in present perfect tense?

Answer 1

Yes this would be acceptable. For example:

• She has had enough.

Answer 2

No, the use of "had" is not correct after the helping verb "has" in the present perfect tense. In the present perfect tense, "has" is used with past participle verbs to indicate actions that have been completed or happened at an indefinite time in the past. So, the correct structure is "has + past participle" (e.g., "has gone," "has eaten").